Get full stack trace in try: catch:

[mbrej]

Hi, is there any way to get a stack trace while in the 'except' part of a try,except?

The best I have got is the error message using:

Code: Select all

except Exception as e:
	text = str(e)

That however just displays 'MemoryError: memory allocation failed, heap is locked,' while ideally I would line the line number and file it occurred in too.

Thanks, Matt

[dhylands]

The best way is to re-raise the error and let it be printed by the C-code.

Perhaps catch the MemoryError and re-raise.

I know we've discussed this, but currently I don't think it can be done from python.

[deshipu]

CPython has a "traceback" module that handles this. Maybe it would make sense to have something similar. https://docs.python.org/2/library/traceback.html

[pfalcon]

And MicroPython has documentation with search facility: http://docs.micropython.org/en/latest/u ... ea=default . (And micropython-lib, which provides traceback module.)

[dhylands]

Sweet - not sure why I didn't know about that.

[mbrej]

Many thanks, it works great.

[semireg]

Where is the traceback module? I looked at the search URL above but didn't see any reference to a dedicated library.

In the meantime, this works for me:

Code: Select all

    except Exception as e:
        log.critical('--- Caught Exception ---')
        import sys
        sys.print_exception(e)
        log.critical('----------------------------')

Edit: This looks like what is being described. https://github.com/micropython/micropyt ... aceback.py

Unfortunately, it just looks like a wrapper to sys.print_exception. What I would like is to have access to the call stack, an array of __name__ would suffice.

[aleskeyfedorovich]

the traceback module does not work because sys.exc_info is not available [link](https://github.com/micropython/micropython/issues/5110)